[PATCH] parse-options: fix SunCC compiler warning

[Nguyễn Thái Ngọc Duy]

The compiler reports this because show_gitcomp() never actually
returns a value:

    "parse-options.c", line 520: warning: Function has no return
    statement : show_gitcomp

The function calls exit() and will never return. Update and mark it
NORETURN.

Reported-by: Ævar Arnfjörð Bjarmason <ava...@gmail.com>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclo...@gmail.com>
---
 parse-options.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/parse-options.c b/parse-options.c
index 3b874a83a0..6577e52f63 100644
--- a/parse-options.c
+++ b/parse-options.c
@@ -474,8 +474,8 @@ static void show_negated_gitcomp(const struct option *opts, 
int nr_noopts)
        }
 }
 
-static int show_gitcomp(struct parse_opt_ctx_t *ctx,
-                       const struct option *opts)
+static void NORETURN show_gitcomp(struct parse_opt_ctx_t *ctx,
+                                 const struct option *opts)
 {
        const struct option *original_opts = opts;
        int nr_noopts = 0;
@@ -550,7 +550,7 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
 
                /* lone --git-completion-helper is asked by git-completion.bash 
*/
                if (ctx->total == 1 && !strcmp(arg + 1, 
"-git-completion-helper"))
-                       return show_gitcomp(ctx, options);
+                       show_gitcomp(ctx, options);
 
                if (arg[1] != '-') {
                        ctx->opt = arg + 1;
-- 
2.20.0.rc2.486.g9832c05c3d